检测显示一楼下面的横梁已经有大面积的腐烂。

Investigations had revealed extensive rot in the beams under the ground floor.

《柯林斯英汉双解大词典》

这些钉子一旦腐烂，巨大的横梁就没法连接了。

Once those pins were rotted, there was nothing to link the giant beams together.

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